Comparison between IEF model and numerical method based on the derivation method of Bridgman to evaluating fracture toughness in galvanized steel sheet

Comparison between IEF model and numerical method based on the derivation method of Bridgman to... The present work proposes a new numerical approach based on the derivation method of Bridgman to determine (K IC ) of galvanized steel sheets. The method relies on a fracture analysis numerical code “Franc2D,” which permits to simulating the initiation and propagation of a crack on grooved tensile specimens. First, the stress intensity factor is obtained while the crack is propagating and then (K IC ) is determined from the fitting curves of the stress intensity factor (K I ) to crack length (a) plot through mathematical transformations. The results are validated by comparing them to those obtained through the experimental approach using Vickers hardness based IEF engineering models. The relative values of (K IC ) are admissible and acceptable with a coefficient of variation of 14% for a large range of groove radius. Hence, the present numerical simulation can be fairly used in order to reduce time consuming and avoid costly experimental mechanical tests. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The International Journal of Advanced Manufacturing Technology Springer Journals

Comparison between IEF model and numerical method based on the derivation method of Bridgman to evaluating fracture toughness in galvanized steel sheet

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Publisher
Springer London
Copyright
Copyright © 2017 by Springer-Verlag London
Subject
Engineering; Industrial and Production Engineering; Media Management; Mechanical Engineering; Computer-Aided Engineering (CAD, CAE) and Design
ISSN
0268-3768
eISSN
1433-3015
D.O.I.
10.1007/s00170-017-0097-4
Publisher site
See Article on Publisher Site

Abstract

The present work proposes a new numerical approach based on the derivation method of Bridgman to determine (K IC ) of galvanized steel sheets. The method relies on a fracture analysis numerical code “Franc2D,” which permits to simulating the initiation and propagation of a crack on grooved tensile specimens. First, the stress intensity factor is obtained while the crack is propagating and then (K IC ) is determined from the fitting curves of the stress intensity factor (K I ) to crack length (a) plot through mathematical transformations. The results are validated by comparing them to those obtained through the experimental approach using Vickers hardness based IEF engineering models. The relative values of (K IC ) are admissible and acceptable with a coefficient of variation of 14% for a large range of groove radius. Hence, the present numerical simulation can be fairly used in order to reduce time consuming and avoid costly experimental mechanical tests.

Journal

The International Journal of Advanced Manufacturing TechnologySpringer Journals

Published: Mar 1, 2017

References

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